4 key things we learned from our time with the new little wonder amp that's £89 / $109 / €99 When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

At this point, there are basically two kinds of guitar amps: old-school tube amps and modern digital amps that do their damnedest to recreate tube amps. The Positive Grid Spark is decidedly the latter ...